Typewriting machine



March 1942- c. F; HANDLEY 2,278,009

TYPEWRITING MACHINE- Filed Sept. 30, 1940 6 Sheets-Sheet 1 FHand/eyINVENTOR or BY ATTORNEYS QNY .NN u mN ww .wwwm

March 3.1, 1942.- s. F. HANDLEY TYPEWRITING MACHINE Filed Sept. 30, 1940a Sheets-Shet 2 Qmw wa FHancZ/ey INVENTOR ATTORNEYS March 31, 1942. a F.HAND LEY IYPIEIWRITING MACHINE Filed Sept. 30, 1940,

6 Sheets-Sheet 3 gun w March 31, 1942. a. F. HANDLEY TYPEWRITING MACHINEFiled Sept. '30, 1940 6 Sheets-Sheet 4 leg W d mm R VE @m Patented Mar.31, 1942 TYPEWRITING MACHINE George F. Handley, Glendale, N. RoyalTypewriter Company, N. Y a corporation of New York Y., assignor to1110., New York,

Application September 30,1940, Serial No. 359,119

35 Claims.

This invention relates to typewriting machines, and more particularly totypewriter ribbon itioning and feeding mechanism. Mechanism embodyingthe invention may be employed advantageously for positioning and feedingtypewriter ribbons or strips of various kinds, but is especially'adaptedfor positioning and feeding narrow carbon paper or like copying stripsor ribbons. The construction disclosed herein as an example of mechanismembodying the invention is shown as being used for the positioning andfeeding of hektograph ribbon producing negative imprints on matrixsheets which subsequently are used for making positive copies.

Typewriters heretofore available commercially for performing such workcustomarily have been equipped to feed hektograph ribbon from a supplyroll usually containing three hundred feet of ribbon. It has beenpossible to guide the ribbon along the printing line so that typeimpressions are made through a ribbon zone on one side only of thehorizontal center line of the ribbon. After the entire length of theribbon has been fed along the printing line, there has remained anunused second ribbon zone on the other side of the horizontal centerline of the ribbon. By turning the ribbon upside down or shifting theribbon guides vertically and running the ribbon past the printing pointagain, it has been possible to make use of the second ribbon zone, sothat the total effective usable ribbon length has been six hundred feet.However, due to the difllculty or impossibility of maintaining theribbon very accurately positioned at just the right level along theprinting line, it heretofore has not been possible to segregate and useseparately more than two zones of ribbon of ordinary commercial width.

An object of the present invention is to provide ribbon positioning andfeeding mechanism which is capable of maintaining the ribbon veryaccurately positioned so as to confine typing impressions within adefinite and sharply defined zone extending longitudinally throughoutthe ribbon. By so confining the typing impressions within an accuratelyand sharply defined zone, it is possible to bring the zones, or thelines of typing in adjacent zones, very close together without danger ofoverlapping of typing impressions. This makes it possible'successivelyto make the typing impressions through three separate zones of ribbon ofa given width as compared to the two zones of ribbon of the same widthavailable separately when used with equipment heretofore "available.Hence mechanism according to the present invention makes possible theeil'ective use of a total of nine hundred feet of ribbon zone in aribbon of the same size as ribbons which heretofore could be used withan effective zone length of six hundred feet.

Another object is to provide ribbon feeding mechanism of the characterreferred to which effects an accurate positioning of the ribbon afterthe line-spacing operation, so that any displacement of the ribbonincident to line-spacing will be overcome or corrected before the typingof a new line starts.

Another object is to provide mechanism for applying tension to theribbon after the typewriter carriage has been moved toline-typingstarting position.

Another object is to provide means for imparting a retractive stretchingto the ribbon following the line-spacing operation.

Another object is to provide ribbon-positioning mechanism of thecharacter referred to with control equipment for rendering thepositioning mechanism incapable of applying tension to the ribbon duringcertain stages of machine operation, such as tabulating or othernon-escapement-controlled carriage movement.

Another object is to provide improved means for feeding ribbon,

Other objects will become apparent from a reading of the followingdescription, the appended claims, and the accompanying drawings, inwhich:

Figure 1 is a top plan view of a typewriter equipped with mechanismembodying the invention, some conventional. parts being omitted;

Figure 2 is afragmentary front elevation of equipment shown in Figure 1;

Figure 3 is a vertical section on the line 3-3 in Figure 1 and drawn onan enlarged scale, some parts being omitted and others being shown inend elevation;

Figure 4 is a fragmentary top plan view drawn on an enlarged scale ascompared to Figure l, and

with some parts being omitted; A

Figure 5 is a vertical section on the line 5-5 of Figure 4; o V

Figure 6 is a detail horizontal section showing pawl and ratchetcontrolled ribbon rolls:

Figure 7 is a vertical section on the line 1-1 of Figure 4;

Figure 8 is a horizontal section on the line H of Figure 7;

Figure 9 is a fragmentary end elevation looking in the direction of thearrow 9 in Figure 1 and being drawn on an enlarged scale;

hon;

' shownin Figure 12, the ribbonpartly in section, taneously merits bymeans of a ball race Figure 10 is a distorted sectional view taken onthe line "-40 of Figure 9, parts being shown in the positions occupiedduring feeding of rib- Figure 11 is a detail vertical sectional viewshowing the relative positions of a hektograph ribbon, regular fabricribbon; matrix sheet, and conventional typewriter parts;

Figure 12 is a detail top plan view of ribbon positioning and tensioningequipment, drawn on an enlarged scale;

Figure 13 is a front elevation of the equipment being shown withcharacter impressions in'its central zone;

Figure 14 is a detail view of a portion of a ribbon with characterimpressions in two ribbon zones;

' Figure showing additionally typing third ribbon zone;

Figure 16 is a fragmentary elevational view of a modified form of ribbonfeed drive clutch;

Figure 1'7 is a fragmentary sectional elevation of tabulating mechanisshowing parts in the positions occupied during tabulating operations;

Figure 18 is a view partly in side elevation and showing mechanism forsimuldisabling ribbon tensioning equipment and carriage escapementmechanism;

Figure 19 is a fragmentary vertical section on the line l9-l9 of Figurelarged scale and showing ribbon-tensioning parts after having beenshifted totension and impressions in the stretch the ribbon;

Figure 20 is a vertical sectional view of a ribbon feed drive clutch,the parts being shown in the positions occupied when the clutch isdisengaged;

Figure 21 is a horizontal section onthe line 21-2! of Figure 20; and

Figure 22 is a horizontal section on the line 22-42 of Figure 20.

the invention may be typewriters of various of illustration, 9. prelMechanism embodying used in connection with kinds. For the purposesferred embodiment plied to a Royal Standard typewriter including a mainframe A and a carriage 13 mounted 'on the frame for letter-spacing andreturn movea carriage rail 2. A platen C is mounted on the carriagebetween end plates 3 and 3', and is adapted to be rotated forline-spacing by a combined line-spacing and carriage return lever 4. Aspring-powered drum or the frame is connected to the carriage in a knownmanner by a draw band 6 for moving the carriage in the letter-spacingdirection. Such carriage movement is controlled by escapement mechanismincluding an escapement wheel 'I mounted on an escapement frame 8 torotate with a pinion 9 adapted to mesh withan escapement rack l carriedby a bail including arms II and H pivoted as at l2--l 2' respectively onthe carriage end plates. Suitable means for disabling the escapementmechanism to permit free movement of the carriage is provided, and inthe form shown includes rack release levers l3 and I3 of a known kindpivoted respectively as at l4l4"on the end plates 3 and 3'. The rackrelease levers are formed with-guide slots l and I5 respectively adaptedto receive pins l6 and i6, and the levers are formed respectively withoffset lifting lugs l1 and I1 engageable under the bail arms H and H 4,drawn on an en-,

of the invention is shown apframe rail l and barrel 5 journaled on forlifting the rack '15 is a view similar to Figure 14 but upon depressionof either of the levers l3- l3'. Adjustable eccentric rack are mountedon the carriage end plates 3 and 3', respectively, for limiting thedownward movement of the rack l0 into engagement with the escapementpinion 9.

The typewriter mechanism such as to Myers 2,007,611, granted July 9,1935. comprises a bracket l9 secured of the'main frame A, and,a centerstop finger 2O pivotally mounted as at 2| on the bracket 13. Atabulating stop finger 22 pivotally mounted as at 23 on the bracket I9is adapted to be rocked coniointly with the center stop lever by anadjustable link 24 pivotally connected to the center stop lever as at 25and pivotally connected to the tabulating finger 22 as at 2B. A columnstop frame generally designated 21 is supported between the carriage endplates 3 and 3' and serves to mount a plurality of column stops 23 onlyone of which is shown. Means for disabling the escapement mechanism andfor rocking the center stop lever 20 and tabulating finger 22 for shownincludes tabulating It to the rear wall performing tabulating operationsincludes a tabulating key lever 29 fulcrumed on the main frame as at 30and having an arm 3i formed with a projection 32 extending behind a rockarm 33 also fulcrumed on the main frame as at 30. A link 34 is connectedbetween the upper end of the rock arm 33 and the lower end of an ex-'tension 35 of the center stop lever 20, the arrangement being such thatwhen the tabulating key lever 29 is depressed the center stop lever 20will be rocked in a clockwise direction and the tabulating finger 22will be rocked in a counter clockwise direction as viewed in Figures 3and 1'1, so as to displace the upper end lever 20 from the path of theusual margin stop (not shown) and move the tabulating finger 22 into thepath of one of the column stops 2! previously set in column-determiningposition.

. a rack-lifting lever 35 pivoted Simultaneously with such movement ofthe, center stop lever, the lower end thereof will engage as at 31 onthe escapement frame 8 and rock it so as to bring an arm 33 of the lever35 into engagement with the bar 33 of the rack'bail for lifting the rackabove and clear of the escapement pinion 9.

As shownin Figure 11, the platen C, mounted on a shaft 40, is arrangedin the usual manner with respect to bottom pressure rolls 4|-4I, a paperbail 42, and a paper pan 43. One type bar 44 is shown in printingposition.

The line-spacing lever combined functions of transmitting line-spacingmovement to the platen and returning the carriage to line-startingposition includes a handle 45 and a short arm. 46 pivotally connected asat 41 to one end of a link 48, the other end of the link being pivotallyconnected as at 48 to a rock arm 50 which carries a pawl 5| engageablewith a ratchet wheel 52 secured to the platen. When the lever 4 isrocked in counter clockwise dibailstops- I. and I3" m that disclosed inthe patent of the center stop 4 which performs the The parts referred toabove may be of known construction and arrangement relative to eachother, and, considered alone or in combination with each other, they donot constitute, the invention claimed herein. The invention resides inother parts to be described, and the combinations of such other partswith each other and with parts which previously have been described.

Equipment for positioning, feeding, and tensioning hektograph or similarstrip ribbon in accordance with the present invention in generalincludes means generally designated D for providing a supply of ribbon51, a positioning and tensioning device generally designated E shown atthe right hand end of the carriage B, a ribbon positioning, holding, andpreferably feeding device generally designated F and shown as mounted atthe left of the carriage, and preferably ribbon take-up mechanismgenerally designated G and shown as mounted at the left of the frame A.In the operation of the positioning, feeding, and tensioning equipmentconsidered generally, ribbon is drawn from the supply which includesmeans for yieldably resisting drawing off of the ribbon, and is thendirected through the positioning and tensioning device E from whence theribbon extends along and past the printing line of the platen andthrough the device F. The ribbon 51 then extends from the device F tothe mechanism G, which is adapted to take up ribbon fed along and pastthe printing line of the platen during movement of the carriage inletter-spacing direction. When the carriage has reached the end of atyped line, the line-spacing lever 4 is operated in the usual manner toeffect linespacing of the platen and return movement of the carriage.Through the instrumentality of'means later to be described, thismovement of the linespacing lever releases. the holding device F and thepositioning and tensioning device E from operative engagement with theribbon, so as to permit the carriage to be returned to line-startingposition without moving the ribbon bodily with the carriage.

When the line-spacing movement has been completed and the carriagereturned. the tensionin device E will reengage the ribbon so as to exerta pull toward the right while the ribbon 68 is formed with separablelower and upper -flanges 88 and 81, respectively, and a removable core88 which is adapted to be constrained to rotate with the lower flange 69by means of a pin 69 fast with the lower flange and extending into anopening 89 in the core. Ribbon-51 is led from the spool 88 around aflanged guide roll 18 journaled on a swingable bracket arm H pivoted onthe bracket 58 as at 12. From the roll the ribbon extends to thepositioning and tensioning device E, and thence along the printing lineof the platen.

The device E is mounted on a bracket 13 secured as atfi to the carriageB, and includes a plate 15 arranged to shift vertically on pins l8 and"secured to the bracket 13.

slide on a pin it, and a spring finger 19 carried by the plate 15 isengageable selectively with grooves 80 and 8! in the pin 18 forreleasably holding the plate 75 in adjusted position. The extension 18is formed with a horizontal projec-' tion 82 serving as a finger piecefor facilitating is held against bodily movement by the take-upmechanism G, which at that time is inactive. When the carriage has beenmoved to position for the starting of a new line of typing and theline-spacing lever is released, the device F will reengage the-ribbon 51and the ribbon positioning and tensioning device E will move a shortdistance toward the right to exert a pull upon and slightly stretch thelength of ribbon extending between the devices E and F. Pulling of theribbon taut at this time realigns the ribbon and removes any lateralshift which may have been imparted to the ribbon during the line-spacingoperation, and assures that during the typing of the next line typeimpressions will be made only in a selected narrow ribbon zone.

Referring more particularly to the ribbon supply means D, a bracket 58mounted on the main frame A'is provided with a spindle 59 on which isjournaled a supply spool 60 held down against a spring friction washer6| by means of a nut 62. A flat leaf spring 63 is pivoted as at 64 onthe bracket 58 and is-held in frictional contact with the roll of ribbon51 by means of a wrap spring 65. In order that the ribbon. after beingused once, may be inverted so as to make a fresh zone available fortyping impressions, the spool vertical adjustment of the plate 15.Movement of the plate to selected vertical positions serves to positionthe ribbon 51' so that it will be guided to present different selectedribbon zones for typing impressions.

A roll-mounting support in the form of a plate 83 is mounted on theplate 15 so as to shift in the direction of carriage movement. At one ofits ends, the support 83 is formed with a slot 84 which receives ashouldered stud 85 secured to the plate I5, and at its other end thesupport 83, is formed with a slot 86 which receives a stud 81 carried bythe vertically shiftabl plate 15. A spring 88 interposed between an ear89 on the plate 83 and an car 90 on the plate 15 urges the plate 83toward the right. that is, in a direction opposite the direction ofletter-spacing and ribbon-feeding movement.

A flanged guide roller 9! journaled on a spindle 92 carried by thevertically shiftable plate 15 guides" the ribbon 51 to the printing lineand directs it between two positioning'and tensioning clamping membersor rolls 93 and 94 so dis-- posed as to discharge the ribbon along theprint. ing line. 95 carried by the horizontally shiftable plate 83, andthe roll 94 isjournaled on a spindle 96 supported on a bell crank lever91 pivoted as at 98 on the plate 83. The arm 91 of the bell crank lever91 is connected by means later to be described to theescapement-disabling mecha nism, so that the lever 91 will be rocked toseparate the rolls 93 and 94 when the escapement rack is lifted.Normally, the clamping roll 94 is held up against the roll 93 by meansof a spring 99 interposed between the lever arm 9'! and the horizontallyshiftableplate 83. When the plate 83 and the rolls 93 and 94 supportedthereon are shifted toward the right at the end of carriage returnmovement for tensioning the ribbon as previously referredto, the rollswill be maintained in clamping relation by the spring 99, and rotationof the rolls will be yieldably restrained by springs I09 and Ill!interposed respectively between the heads of the spindles and 98 and theassociated rolls 93 and 94.

For unclamping the rolls 93 and 94 and positioning them preparatory toeffecting the final clamping and tensioning operation; means areprovided for shifting the plate 83 to the left, simultaneously movingthe roll 94 away from the roll 93 and then bringing the roll 94 backinto I The plate is formed with an upper extension 18 arranged to Theroll 93 is journaled on a spindle cam lever is formed movement (towardthe clam ing position. lever l02 is pivoted as at I03 on the plate 18and is held in normal position against a stop pin I04 by aspring I05interposed between the stud 81 and an ear I86 on the cam lever. The withan extended, inclined is disposed in the path of left) of a cam followernose I08 on the bell crank lever 91. Figure 4 shows the parts in thepositions occupied'before the movement of the plate 83 toward the left.As the plate 83 moved toward the left, the cam cam surface I01 which,follower nose I09 willride up on the extended cam surface I01 so as tomove the clampingroll 94 away from the roll 93.. Continued movement ofthe plate 83 finally will bring the cam follower nose I08 beyond theextended sam surface I01, whereupon the spring 99, by rocking the bellcrank lever 91, will move the nose I03 behind the cam surface I01, theparts thus being brought to the relative positions shown in Figure 12with the roll 94 in ribbon-clamping relation with respect to the roll93. when, subsequently, the plate 83 is moved to the right for pullingthe ribbon taut, the spring I06 will yield so as to permit rocking ofthe cam lever I02 and uninterrupted movement of the nose I03 withoutmoving the roll 94 away from the roll 93. It will be understood thatplate 83 is effected in timed relation to the linespacing operation andthe placing of the carriage in line-starting position. The mechanism foreffecting the timed relation will be described hereinafter. Y

The ribbon positioning, feeding, and holding device F includes twonon-reversible rolls I09-I I 0 adapted to grasp the ribbon 61 extendedto the left beyond the platen printing line. The roll I09 is mounted torotate on a fixed spindle III carried by a plate II2 supported on anextension II3 of the carriage end plate 3. The roll I09 is equipped witha ratchet wheel II4 arranged to cooperate with a pawl II6 held by aspring H6 in the direction of the arrow a in Figure 6 but to preventrotation in the opposite direction.

- The roll H0 is journaled on a spindle 1 carried by a bracket H3 fastwith the line-spacing lever 4. The roll IIO is provided with a ratchetwheel I I9 co-operable with a pawl I urged by aspring I2I intoengagement with the ratchet so as to permit rotation of 'the roll H0 inthe direction of the arrow 0. iii-Figure 6 but to prevent rotation inthe opposite direction. The line-spacing lever 4 and with it the bracketII8 are urged by a spring I22 interposed between the bracket and a studI29 so as normally to maintain the roll H0 in clamping position withrespect to the roll I09. When a line is being typed and the carriage ismoving in letter-spacing direction,

the horizontal shifting of the so as to permit rotation of the roll inthe form shown. a cam; rection of carriage travel in order to presentselected longitudinal ribbon zones at the printin poin a designated I2418 mounted at the left of the rolls. I09 and H0. This device includes aplate I23 equipped with a crosshead I23 embracing and being slidableupon a flat guide I21 extending down from the plate I22. The plate I25is .equipped with a U-shaped ribbon guide I23 bethe rolls I09 and H0will grip the ribbon 51, I

and, since the rolls cannot operate reversely to the directionsindicated by the arrows a and a, the rolls will pull the ribbon 51 inthe direction of the arrows b, so that fresh ribbon moves up to andbeyond the printing point at exactly the same rate as the platen andwork sheet 56. When the carriage is being returned to starting position,the line-space lever is rocked so as to hold the roll IIO separated fromthe roll I09, permitting the carriage to return without causing therolls I0 9and IIO to ,tear or move the ribbon bodily in the direction ofcarriage return movement.

For shifting the ribbon transversely to the ditween the upper and ribbon51 is positioned as shown in Figure '7. For maintaining the'ribbon inadjusted position, a spring detent I29 is secured to the plate.ll2 as atI34, and it is adapted to engage selectively notches HI and I32 formedin an ear I33 on the plate I26. A finger piece I34 on the plate I25facilitates shifting of the guide I28. Upward shifting movement thereofis limited by engagement of the crosshead I26 with the bottom of theplate H2, and downward'shifting movement i limited by engagement of thecrosshead I26 with a screw I35.

Referring now to the mechanism for operating the devices E and F intimed relation to each other and to the line-spacing-and carriage returnoperations, a link I36 is pivoted at one end as at I31 to an arm I38 onthe bracket II8 carried by the line-spacing lever 4.'- The rear endofthe link I36 is formed with a slot I39 which receives a pin I40 on arock arm I secured to ashaft I42 .mounted on the rear ends of thecarriage end plates 3 and 3'. The pin and slot I43 and I provide a lostmotion connection between the line-space lever and the rock shaft I42.The right hand end of the rock shaft is provided with a rock arm I43which is pivotally connected as at I44 to the rear end of a link I45,the front end of which is pivotally connected at I46 to a bell cranklever I41 pivoted as at I43 on the bracket 13. The bell crank lever I41has an arm I49 provided with a long pin I50 received in .a slot I5I inthe horizontally shiftabie plate 83. The length of the pin I50 issufficient to assure continued engagement of the pin in the slot I5Iwhen. the plate 15 is shifted'vertically to either of its-two positionsfor changing the zone of the ribbon to be presented at the printingpoint.

. In operation, when the line-spacing and car riage return lever 4 isrocked counterclockwise as viewed in Figure 4, the link I36 will bethrust rearwardly from the position shown in Figure 9 until the frontend of the slot I39 engages the pin I40. During this idle or lost motionmovement of the link I36, the line-spacing pawl 5| will have gonethrough'its idle movement.

Continued movement of the line-spacing lever will move the link I36further rearwardly and rock the arm I and shaft I42 concurrently withline-spacing movement of the platen. This rocking of the shaft I42 willrock the arm I43 so as to pull the link I45 rearwardly, thereby rockingthe bell crank lever I41 and moving the support plate 83 toward the leftas viewed in Figure ,4. During this movement of the plate 33 and therolls 93 and 94 supported thereon, the roll 94 will move away from the.roll 93. and, ,as previously described, will then return toward the roll93 so as togrip the ribbon in the manner previously described. By thistime the line-spacing movement of the lever 4 will have been completed,and further manual effort exerted on the lever will move the carriage inthe return-direction while the rolls I09 and H0 of the device F aredisengaged from the ribbon ribbon-shifting device generally lowerflanges of which the -to line-starting position, the line-spacing lever6 will be released, permitting theflspring I22 to return it to theposition shown in Figure 4 with the rolls I09 and H gripping the ribbon51.

This return movement of the line-spacing lever 6 will releasethe holdingaction of the lever 2,278,009 r v i driving spring barrel or drum mesheswith a.

gear I16 fast on a shaft I11 journaled on a bracket I16 secured as 'atI19 to the mechanism frame "I. A bevel gear I60 fast on the shaft I11meshes with a bevel gear I6I secured to a shaft I62 journaled-on themechanism frame "I, and a bevel gear I63 fast on the shaft I62 meshes 1with a bevel gear I36 secured by a setscrew I65 to the mechanism frame"I.

I61 upon the shiftable plate 63 so as to permit 93 and 96 carriedthereby toward the right, thus effecting the desired flnalstretching ofthe ribbon preparatory to typing a newline.

Means are provided for releasing the rolls I09 and H0 of the device Fand the rolls 93 and 96 of the device Ewhen the carriage escapementmechanism is disabled. In the form'shown, this means includes an arm I52pivoted as at I53 on the carriage end plate 3, and projecting over thebail bar 39. Fast with the arm I52 is a vertically extending arm I56provided with a pin I65 received in a slot I56 in the link I36. An armI51 pivoted on the carriage endplate 3' as at I56 extends over the bailbar 39 and is formed with a vertically extending handle I59 which ispivoted as at I60 to one end of a' link I9I, the'other end of which ispivoted at I62 to the arm 91 of the bell crank 'lever.91. Lifting of theescapement rack I0 by depression of one of the rack release leversI3-I3' or by de-' pression of the tabulating key 29 will liftthe armsI52 and I51. Lifting of the arm I52 will rock the extension I56. causingthe pin I56 to push the link I36 rearwardly, thus rocking the shaft I62and shifting the plate 63 and rollers facilitate introduction of theribbon between them without separating the rolls I09 and I I0.

The take-up mechanism G, considereddn its most general nature; issimilar to the take-up mechanism disclosed in the co-pending applicationof George'F. Handley filed July 20, 1939, Serial No. 285,598. Asembodied in the present construction, the take-up mechanism G receivesthe ribbon which passes from the positioning guide I26 around a flangedguide pulley I63 mounted on an arm I66 which is swingable. about a pivotI65 on a bracket 866 supported on the main frame. tends around a flangedguide roll I61 supported bya bracket I66 carried on the bracket I66. Theribbon extends downwardly from the roll I61 and around a flanged rollI69 journaled on a bracket I10 supported by a take-up mechanism frameI11 attached to the main frame as at I12. The ribbon extends from theroll I69 to a take-up roll spool I13 mounted to turn freely on a shaftI16 journaled in the mechanism frame I1I.

Connections interposed between the take-up roll I13 and the carriage Bprovide for driving the take-up roll during letter spacing movement ofthe carriage but not during return movement From the roller I63 theribbon ex the spring 66 to pull the plate 63 and the rolls 7 a sleeve m.M shown in Figure 20 the sleeve I36 extends through a bracket I61mounted on A clutch element I36 secured to the sleeve I66 by a set screwI69 cooperates with the gear 136 for holding the sleeve I66 againstaxial movement. A shaft I90 isprovided with a reduced upper end portionI9-I which is received for free rotation within the sleeve I66. Ashoulder I92, at the juncture of thebody portion of the shaft I90 andthe reduced end portion I9I, and acollar I93, at the top of the reducedend portion I9I, engage opposite ends of the sleeve I66 for holding, theshaft (90 against axial movement,

A toothed ratchet clutch element I96 is mounted to slide on the shaftI90 but is constrained to rotate therewith by means of a pin I95received in a slot I96 formed in a collar I91 secured to the shaft I90by means of a set screw I96. A spring I99 interposed between the collarI91 and the clutch element I96 urges and normally maintains is urged bya spring 209 into yielding engagement with a serrated wheel 2I0 securedto, the

' take-up spool I13. When the carriage is moved in letter spacingdirection, drive will be transmitted, through the gearing and clutchdevice I96-200-I96 to the shaft I16, causing the arm 206 and pawl 206carried thereby to rotate in a direction tending to rotate the take-upspool I13 in the direction of the arrows c in Figures 3, 9, and 10. Theratio of the gearing between the carriage and the shaft I16 is such thatthe shaft tension so that the ribbon will be wound snugly thereof. Agear I15' secured to the carriage-J5 upon the take-up roll. The teeth onthe wheel 2I0 have the same angle or inclination on each side, the anglebeing such that there is no positive drive connection between the pawl206 and the serrated wheel. The serrations or teeth provide for greaterfrictional driving contact between the pawl and the teeth than would beprovided if the periphery of the wheel 2I0 were smooth. Thus the pawl206 drives the take-up spool frictionally to maintain the ribbon 51taut, yet the pawl can be cammed up by the'inclined tooth or serrationsurfaces to permit relative slipping between the pawl and serrated wheelend thrust is exerted upon the spool.

During carriage return movement the clutch elements I99 and 299 willrotate reversely with the element 299 slipping idly over the teeth ofthe element I94 and transmitting no drive thereto. To prevent reverserotation of the take-up spool drive clutch. The parts shown in thismodiflcation are the same as those forming the clutch shown in Figures10 and with the exception that the clutch disc I99 in the modificationis formed with rigid teeth I99 instead of being provided with a springclutch pawl 299 as spool I13 a back check pawl 2II pivoted as at 2I2 onthe mechanism frame I1I is urged by a spring 2I3 into engagement with afine toothed ratchet 2I4 secured to the take-up spool.

In order that the ribbon may be removed from the take-up spool I13 afterit has been completely wound thereon and returned to the supply spool 99preparatory to feeding the ribbon along the writing line again with afresh ribbon zone presented for typing, the take-up spool I19 is formedwith separable spaced discs 2 I9-2I9 and a removable winding core 99fitted over the hub 2I9 of the disc 2I9. The core is constrained torotate with the disc 2I9 by means of a pin 2" extending into the opening99 in the core. A collar 2I9 held fast to the shaft I14 by a set screw2I9 is formed with an annular groove 229 adapted to receive a pin 22Icarried by a spring 222 secured to a finger knob 223. Preferably, theknob 223 is secured to the'disc 2I9, so that, when the pin 22I iswithdrawn from the groove 229, the

' knob 223 anddisc 2I9 may be removed as a unit,

after which the core 99 and the ribbon wound thereon may easilyberemoved and transferred to the supp y spool 60.

As previously described, the rolls of the devices E and F are releasedfrom the ribbon when the tabulator key 29 is "depressed so as not tofeed ribbon during the tabulating operation. In order to prevent thetake-up spool from drawing ribbon from the supply during tabulatingoperations', means are provided for disengaging the clutch elements 299and I94 when the tabulating key is depressed. A rock shaft 224 isjournaled On the frame A as at 229 and 229 and is provided at one endwith an arm 221 which is pivoted at 229 to a link 229 the lower end ofwhich is formed with a loop 239 which receives in the embodimentpreviously described.

When the carriage has been moved to the left considerably beyond theposition shown in Figure 1, the ribbon 91 will extend from theframemounted guide roll 19 in front of the axis of the platen C andbeyond the right-hand end of the platen. -If the platen-rotating knobwere secured to the platen shaft 49 to rotate about the same axis as theplaten, as is customary, the knob would be disposed immediately behindand close to the ribbon 91. In such position it would be diflicult forthe operator to manipulate the knob without disturbing the ribbon and,even if the operator were careful not to touch the ribbon with thefingers, the operators sleeve or cut! would be apt to brush against theribbon. In ac- .cordance with the invention, this dimculty is terposingdriving connections between the knob and the platen shaft. In the formshown the shaft 49 is provided with an axial extension 49' whichisjournaled as at 24924I' on an extension 242 of the bracket 13. A gear243 fast with the platen shaft extension 49'- meshes with an idler gear244 carried by a pintle 249 supported by a pin 231 on the tabulating keylever 29. An

arm 232 secured to the rock shaft 224 is pivotally connected at 233 tothe front end of a link 234,

the rear end of which is pivotally connected at 239 to a lever 239fulcrumed as at 231 on the mechanism frame "I. The lever 299 carries apin 239 which extends above the flange I94 of the clutch element I94. Aspring 239 connected to the lever 239 normally holds the lever inposition with the pin 239 elevated so as to relieve pressure on theflange I94 and permit the spring I99 to hold the clutch element I94 inoperative engagement with the clutch pawl 299. When the tabulating keylever 29 is depressed, the pin 23I will engage the bottomof the loop 239so as to move the link 229 downwardly and rock the arm 221, the shaft224, and the arm 232 so as to pull forwardly on the the lever 239 andcause the pin 239 carried thereby to push downwardly on the flange I94so as to move the clutch element I94 to the Figure 20 position out ofengagement with the clutch pawl 299. Thus, movement of the carriage inthe letter-spacing direction during tabulating operations will nottransmit drive to the take-up spool I19.

Figure 16 shows a modified form of take-up the bracket extension 242.The idler gear 244 meshes with a gear 249 fast with a shaft 241 whichcarries the platen rotating knob 249. As

showninFigure5the knob 249isdisposedwell above the ribbon 91 and may bemanipulated readily without danger of disturbing the desired precisealignment of the ribbon.

Operation To prepare the machine for operation the brackets H and I94are swung to position the flanged guide rolls 19'and I93 as shown inFigure 1. Ribbon 91 from the supply spool 99 is lead around the flangedrolls 19 and 9I. The handle I99 is pushed rearwardly to rock the bellcrank lever 91 and move the roll 94 of the device it away from the roll99 after which the ribbon is threaded between the rolls 94 and 93 and istrained along the printing line of the platen.

,The line spacing lever 4 is moved just suiflciently ribbon is threadedthrough the U-shaped guide link 234. This will rock I29, thencesuccessively around the flanged rolls I93, I91, and I99 and thence tothe take-up spool I13. The latter may be given several turns manually inorder to secure the end of the ribbon to the core 99 and to provideinitial tensioning of the length of ribbon extending between the take-upspool and the feeding device F. Movement of the ribbon toward the lefteffected by manual rotation of the take-up spool I13 can take placewithout opposition by the mils I99- H0, since these are free turn in thedirections of the arrows a and a in Figured. One of the carriage releaselevers I9 01'. I9 is depressed to raise the rack i9 and thus free theescapement mechanism,.at the same time separating the rolls of thedevices E and F. The

carriage is then moved freely in the letter-spacing direction to testthe retarding drag on the spool 90, which should-be sufficient toprevent the take-up spool I19 from being driven to draw ribbon from thesupply spool. The proper ad- Justment is eflected by tightening thethumb nut 92 until the supply spool 90 will hold the ribbon 51 and thetake-up spool 'I 19 with sufiicient force to cause the driving pawl 209to slip on the ratchet 2i 0.

Typing is thenperformed in the usual manner,

. and as'the carriage moves in the letter-spacing direction the rollsI09 and I I of the device F, being unable to rotate reversely, will pullthe ribbon 91 along with the platen. The ribbon extending to the leftbeyond the device 1'' will be maintained under tension and rolled up bythe take-up spool I13 as previously described.

If,' during the writing of a line, a tabulating operation is performed,depression of the tabulator key lever 29 will move rolls 94 and I99respectively away from the rolls 93 and H0 and, at the same time, willinterrupt the drive to the take-up spool I19, thus permitting thecarriage to move freely without feeding ribbon past the passed beyondthe cam surface extension I91,

whereupon the roll 94 will move back to return movement of the device E,together with the -carriage, will impart a preliminary tensioning to theribbon. When the line-spacing lever 4 is released and returned to itsnormal position by the spring I22, the spring 99 of the device E willpull-the plate 99 toward the right from the printing point while no typeimpressions are being made, thereby avoiding waste. Movement of thecarriage in either direction with the escapement mechanism disabled inthe manner previously described will not effect any feeding of theribbon 51. If the carriage is being moved in the return direction, theclutch pawl 200 will slip idly over the clutch element I94 so as not torotate the shaft I90 and the shaft I14. When the carriage is movingfreely in the letter-spacing direction .with the Iescapement mechanismdisabled, the shafts I90 and I14 will be driven from the spring drum 6and connecting gearing and clutch 209-494, but the take-up spool I13will be held against turning by the friction exerted on the supply spool'90, so that the take-up spool will remain stationary while the pawl 209slips idly over the ratchet wheel 2I0. If at any time it is desired tomove the carriage in the return direction without imparting line-spacingmovement to the platen, any fixed part on the carriage, such as theplaten-rotating knob 248, may be pressed toward the operator's right.This will not separate the roll I I0 from the roll I09, but the ribbon51 nevertheless will not be torn because the rolls I09 and H0 are freeto rotate in the directions of the arrows a and a shown in Figure 6.

When the typing of the line has been completed, the line-spacing lever 4is rocked so as to effect line-spacing 'movement of the platen andreturn movement of the carriage in the usual manner. Movement of theline-spacing lever will first move the roll IIO of the device F awayfrom the roll I09 and disengage the roll IIO from the ribbon. Furthermovement of the lever 4 will effect line-spacing of the platen and willpush the link I39 rearwardly to rock the shaft I42, pull the link I45rearwardly, rock the bell crank lever I41, and shift the plate 93 fromthe position shown in Figure 4 toward the left. During this movement ofthe plate 89 the roll 94 of the device E will be moved away from theroll 95 until after the nose I09 of the lever 91 has position shown infull lines in Figure 12 to the position shown in dotted lines in Figure12 andin full lines in Figures 1 and 4. This final movement. of theplate "and rolls 99 and 94 will exert a final pull on the ribbon 51.which is held against bodily movement at the left-hand end of theplaten, so that the ribbon will be stretched slightly and straightenedout, thus correcting any disturbance of the alignment of the ribboncaused by line-spacing movement of the platen and work sheet 59.

Because of the very accurate aligning of the ribbon preparatory to thestarting of each new line of typing made possible by the finaltensionlng of the ribbon described above, typing may be performedseparately in three distinct, narrow, longitudinal ribbon zones, I, II,and 111, without danger of overlapping of type impressions. When a newribbon is used, the ribbon guiding device E may be set as indicated infull lines in Figures 5 and ,13. wherein the vertically shiftable plate16 and parts carried thereby are in their lower positions. The ribbonguide I24 at the left of the carriage also will be set in its lowerposition, as shown in full lines in Figure 7.

The ribbon will then be so positioned as to present the central zone Ialong the printing line, as indicated in Figure 13. When the centralzone of the ribbon has been used completely, the

' core 69 is removed from the take-up spool I13 and placed in the supplyspool 90 without being inverted, and the ribbon again is threadedthrough the guides which, however, are now moved to their upperpositions as indicated in dotted lines in Figures 5 and 7, respectively.The ribbon will then be guided so that the zone designated II will befed along the printing line. After zone 11 has been used completely, thecore 68 with the ribbon thereon again is removed from the take-up spoolI13 and returned to the supply spool 90, but this time it is inverted onthe supply spool and is threaded through the guides so that the zonedesignated III will be presented along the printing line.

The ribbon positioning; feeding, and tensioning mechanism disclosedherein may be applied easily to a standard machine to adapt the machinefor use in hektograph or photo-offset work.

A machine equipped with the mechanism can be conditioned or adaptedquickly for ordinary typing without the removal of any parts. The

- mechanism disclosed herein embodies the invena carriage mountedthereon for letter-spacing and return movements; a platen mounted on thecarriage; means for mounting a ribbon supply on the frame and fordirecting ribbon from the supply along the writing line of the platen tobe ifed in the direction of carriage letter-spacing movement; a pair ofrolls journaled ,on the carriage to move in advance of the platen duringletter-spacing movement, said rolls being adapt-- ed to grip the ribbon;a reverse-rotation-preventing device connected to at least one of saidrolls to' hold said rolls from turning when the carriage is moved inletter-spacing direction whereby said rolls will pull the ribbon alongwith the carriage and platen during letter-spacing, said devicepermitting tree rotation of said rolls during carriage return movementand with the rolls in gripping engagement with the ribbon; and ribbontake-up means for preventing movement of the ribbon in carriagereturndirection.

2. In a typewriter or like machine, a frame;

a carriage mounted thereon for letter-spacing and return movements; aplaten mounted on the carriage; means for mounting a ribbon supply onthe frame and for directing ribbon from the supply along the writingline of the platen to be fed in the direction of carriage letter-spacingmovement; a pair of rolls journaled'on the carriage to move in advanceof the platen during letter-spacing movement, said rolls being adaptedto grip the ribbon; a pawl and ratchet device connected to at least oneof said rolls tohold said rolls from turning when the carriage is movedin letter-spacing direction whereby said rolls will pull the ribbonalong with the carriage. and platen during letter-spacing, said devicepermitting free rotation of said rolls during carriage return movementand with the rolls in ppin engagement with the ribbon; and ribbontake-up means for preventing movement of the ribbon in carriage returndirection.

3. In a typewriter or like machine, a frame; a carriage mounted thereonfor letter-spacing and return movements; a platen mounted on thecarriage; a carriage return lever; means for mounting a. ribbon supplyon the frame and for directing ribbon from the supply along the writingline oi the platen to be fed in the direction of carriage letter-spacingmovement; a pair, of rolls joumaled on the carriage to move in advanceof the platen during letter-spacing movement, said rolls being adaptedto grip the ribbon; means movable in response to operation of thecarriage return lever for shifting one of said rolls away from the otherroll to release the ribr bon; a reverse-rotation-preventing deviceconnected to at least one of said rolls to hold said rolls from turningwhen the carriage is moved I in letter-spacing direction whereby saidrolls will pull the ribbon along with the carriage and platen duringletter-spacing, said device permitting free rotation of said rollsduring carriage return movement and with the rolls in grippingengagement with the ribbon; and ribbon take-up means for preventingmovement of the ribbon in carriage return direction.

4. ma typewriteror like machine, a traveling carriage; a platen thereon;means mounting a ribbon supply and training a, length of ribbonalong'the writing line of the platen; means for feeding ribbon alongsaid writing line in one direction; and means operable after movement ofthe carriage to line-typing starting position and stopping of thecarriage in such position for applying tension to the ribbon extendingalong the writing line oi the platen.

5. In a typewriting or like machine, a frame; a carriage mounted forletter-spacing and return movements thereon; a platen mounted on thecarriage; means mounting a ribbon supply on the machine; and means forpositioning, guiding, and tensioning ribbon along theiwriting line ofthe platen including a device at oneend of the machine adapted toprevent movement of the ribbon toward the other end of the machine, anda device at said other end of the machine operable after movement of thecarriage to linetyping starting position and stopping of the carriagein, such position for pulling toward said other end the ribbon extendingbetween said two devices.

6. In a typewriting or like machine, a frame; a carriage mounted forletter-spacing and return movements thereon; a platen mounted on thecarriage; means mounting a ribbon supply on the machine; means forpositioning, guiding, and tensioning ribbon along the writing line ofthe platen including a device at one end of the machine adapted toprevent movement of the ribbon toward the other end of the machine, anda device at said other end of the machine-operable after movement of thecarriage to linetyping starting position and stopping or the carriage insuch position for pulling toward said other end the ribbon extendingbetween said two devices; and means for shifting said ribbonpositioning, transversely to the direction of extent of the ribbonbetween said twodevices.

7. In a typewritlng or like machine, a frame; a carriage mounted forletter-spacing and return movements thereon; a platen mounted on thecarriage; manually operable means for effecting return movements of thecarriage; means mounting a ribbon supply on the machine; means forfeeding ribbon from said supply and for preventing reverse movement orthe ribbon; and

means operable in response to releasing of said manually operable meansafter positioning of the carriage at rest in line-typing startingposition for stretching the ribbon while it is held by thereverse-movement-preventing means.

8. In a typewriting or like machine, aframe; a carriage mounted forletter-spacing and return movements thereon; a platen mounted on otherend of the machine and between which the ribbon extends; and means forshifting said clamping members in a direction to exert a pull on thatlength of ribbon which extends from the clamping members to saidnon-reversible means.- l

9. In a typewriter or like machine, a traveling carriage; a platenthereon; a linespacing actuator connected to said platen; means mountinga ribbon supply and training a length of ribbon along the writing lineof the platen; means for feeding ribbon along said writing line in onedirection; and means responsive to releasing and returning oi theline-spacing actuator to inactive position for applying tension to theribbon extending along the writing line of the platen.

l0. In a typewriter or like machine, a carriage mounted forletter-spacing and return moveguiding, and tensioning means aaraooements; a platen mounted on the carriage; mechnism for impartingline-spacing movements to a work sheet positioned in cooperativerelation to said platen; a ribbon supply; means for feeding ribbon incooperative relation to the platen; means for maintaining the ribbonunder tension during carriage return movement; and means responsive toline-spacing operation of said mechanism and return thereof to inactiveposition for applying increased tension to the ribbon.

11. In a typewriter or like machine, a carriage mounted forletter-spacing and return movements; a platen mounted on the carriagefor line-spacing movements; a line-space actuator connected to theplaten; a ribbon supply; means for feeding ribbon in cooperativerelation to the platen; means for maintaining the ribbon under tensionduring carriage return movement;

and means responsive to movement of the linespace actuator for applyingincreased tension to the ribbon after completion of carriage returnmovement.

12. In a typewriter or like machine, a carriage mounted forletter-spacing and return movements; a platen mounted on the carriage; aribbon supply; means for feeding ribbon toward one end of the machine incooperative relation to the platen and for preventing bodily movement ofthe ribbon in the reverse direction; a,

clamping device mounted on the carriage at the other end of the machine;means for effecting disengagement of said-device from said ribbon; andmeans foreflecting operative clamping engagement of said device withsaid ribbon and effecting movement of said device aiter completion ofcarriage return movement for pulling on and tensioning a length ofribbon extending past the platen.

13. In a typewriter or like machine, a carriage mounted forletter-spacing and return movements; a platen mounted on the carriage; aribbon supply; means for feedingribbon toward one end of the machine incooperative relation to the platen and for preventing bodily movement ofthe ribbon in the reverse direction; a support movably mounted on saidcarriage; a pair of separable clamping members carried by said supportand between which the ribbon extends; means for selectively effectingseparation and clamping engagement of said clamping members; meansformoving said support and the separated clamp-r ing members withrespect to the ribbon in the direction of ribbon feed; and means formoving the I support and engaged clamping members in the oppositedirection for pulling the ribbon in said opposite direction.

14. In a typewriter or like machine, a carriage mounted forletter-spacing and return movements; a platen mounted on the carriage; aribbon supply; means for feeding ribbon toward one end of the machine incooperative relation to the platen and for preventing bodily movement ofthe ribbon in the reverse direction; a support movably mounted on saidcarriage; a pair of separable clamping rolls carried by said support andbetween which the ribbon extends; means for selectively effectingseparation and clamping engagement of said clamping rolls; means formoving said support and the separated clamping rolls with respect to theribbon in the direction of ribbon feed; and means for moving the supportand engaged clamping rolls in the opposite direction.

for pulling the ribbon in said opposite direction. 15. In a typewriteror like machine, a carriage mounted for letter-spacing and returnmovements; a platen mounted on the carriage; a ribbon supply; means forfeeding ribbon toward one end of the machine in cooperative relation tothe platen and for preventing bodily movement of the ribbon in thereverse direction; a support movably mounted on said carriage; a pair ofseparable clamping rolls carried by said support and between which theribbon extends; means for selectively efiecting separation and clampingengagement of said clamping rolls; means for moving said support and theseparated clamping rolls with respect to the ribbon in the direction ofribbon feed; means for moving the support and engaged clamping rolls inthe opposite direction for pulling the ribbon in said oppositedirection; and means for yieldably restraining rotation of one of saidrolls.

between which the ribbon extends; means for selectively effectingseparation and clamping engagement of said clamping rolls; means formoving said support and the separated clamping rolls with respect to theribbon in the direction of ribbon feed; means for moving the support andengaged clamping rolls in the opposite direction for pulling the ribbonin said opposite direction; and a spring contacting one of said rollsfor yieldably restrainingrotation of said rolls.

1'7. In a typewriter or like machine, a carriage mounted forletter-spacing and return movements; a platen mounted on the carriage; aribbon supply; means for feeding ribbon toward one end of the machine incooperative relation to the platen and for preventing bodily movement ofthe ribbon in the reverse direction; a clamping device mounted on thecarriage at the other end of the machine; means for efiectingdisengagement of said device from said ribbon; and spring means foreflecting operative clamping engagement of said device with said ribbonand effecting movement of said device after completion of carriagereturn movement for pulling on and tensioning end of the machine incooperative relation to the platen and for preventing bodily movement ofthe ribbon in the reverse direction; a support movably mounted on saidcarriage; a pair of sep-' arable clamping members carried by saidsupport and between which the ribbon extends; releasable manuallyoperable means for separating said members and movingthe support and themembers with respect to the ribbon in the direction of ribbon feed; aspring for then eflecting clamping engagement of said members with saidribbon; and means responsive to releasing of the manually operable meansfor moving the support and the clamping members in the oppositedirection with the ribbon clamped between said clamping members.

19. In a typewriter or like machine, a carriag'e mounted forletter-spacing and return movements; a platen mounted on the carriage; acombined line-spacing and carriage return lever mounted on the carriageand being connected to the platen; a ribbon supply; means for feedingribbon toward one end of the machine in cooperative relation to theplaten and for preventing bodily movement of the ribbon in the reversedirection; a support movably mounted on the carriage; a pair ofseparable clamping members carried by said support and between which theribbon extends; operative connections between said lever and saidsupport for moving the support in the direction of ribbon feeding whensaid lever is moved to efiect line-spacing; means for separating saidclamping members during said movement of said support and said members;means for effecting clamping engagement of said members after saidmovement of said support and members; and means operable in response toreleasing of said lever for moving said support and said clampingmembers in the opposite direction to exert a pull on said ribbon.

20. In a typewriter or like machine, a carriage mounted forletter-spacing and return movements; a platen mounted on the carriage; acombined line-spacing and carriage return lever mounted on the carriageand being connected to the platen; a ribbon supply; means for feedingribbon toward one end of the machine in cooperative relation to theplaten and for preventing bodily movement of the ribbon in the reversedirection; a plate movably mounted on the carriage; a pair of separableclamping rolls carried by said plate and between which the ribbonextends; operative connections between said le- 1 ver and said plate formoving the plate in the direction of ribbon feeding when said lever ismoved to effect line-spacing; a cam device for I separating saidclamping rolls during said movement of said plate and said rolls; aspring for effecting clamping engagement of said rolls after saidmovement of said plate and rolls; and a spring operable in response toreleasing of said lever for moving said plate and said clamping rolls inthe opposite direction to exert a pull on said ribbon.

21. In a typewriter or like machine, a frame; a carriage mounted thereonfor letter-spacing and return movements; a platen mounted on thecarriage; a combined line-spacing and carriage return handle mounted onthe carriage; a ribbon supply mounted on the frame; means for guidingribbon from one end of the machine along the printing line of theplaten; means at the other end of the machine for feeding ribbon and forpreventing reverse movement of the ribbon; a support mounted on. thecarriage at said firstnamed end of the machine for movement relative toth carriage in the directions of carriage travel; a first roll joumaledon said support; a lever pivoted on said support; a second rolljournaled on said lever and being adapted to clamp the ribbon againstsaid first roll; connections between said handle and said support forshifting the support in the direction of ribbon feeding in response toline-spacing movement of said handle; a cam for rocking said lever toseparate said rolls during such movement of the support; a springconnected to said lever for rocking it to bring said second roll toribbon-clamping position after said movement of the support; and aspring effective in response to return'of the handle to normal positionfor moving said support oppositely to the direction of ribbon feed-' andreturn movement's; aplaten mounted on the carriage; a combinedline-spacing and carriage return handle mounted on the carriage; aribbon supply mounted on the frame; means for guiding ribbon from oneend of the machine along the printing line of the platen; means at theother end of the machine for feeding ribbon and for preventing reversemovement of the ribbon; a support mounted on the carriage at saidfirstnamed end of the machine for movement relative to the carriage inthe directions of carriage travel; a first roll journaled on saidsupport; a roll-carrying lever pivoted on said support; a second rolljournaled on said roll-carrying lever and being adapted to clamp theribbon against said first roll; connections between said handle and saidsupport for shifting the support in the direction of ribbon feeding inresponse to linespaoing movement of said handle, said connectionsincluding a bell crank lever pivotally mounted on said carriage andhaving one arm connected to said support, a rock shaft mounted on saidcarriage and extending in the direction of carriage movement, rock armssecured to opposite ends of said shaft respectively, a link connectionbetween said handle and one of said rock arms, a

and a link connection between the other arm of said bell crank lever andthe other of said rock arms; a cam for, rocking said roll-carrying leverto separate said rollsduring such movement of the support; a springconnected to said rollcarrying lever for rocking it to bring said secondroll to ribbon-clamping position after said movement of the support; anda spring effective in response to return of the handle to normalposition for moving said support oppositely to the direction of ribbonfeeding.

23. In a typewriter or like machine, a frame;

a carriage mounted thereon for letter-spacing and return movements; aplaten mounted on the carriage; a combined line-spacing and carriagereturn handle mounted on the carriage; a ribbon supply mounted on theframe; means for guiding ribbon from one end of the machine along theprinting line of the platen; means at the other end of the machine forfeeding ribbon and for preventing reverse movement of the ribbon; asupport mounted on the carriage at said first-named end of the machinefor movement relative to the carriage in the directions of carriag'etravel; a first'roll journaled on said support; a lever pivoted on saidsupport; a second roll journaled on said lever and being adapted toclamp the ribbon against said first roll; connections between saidhandle and said support for shifting the support in the direction ofribbon feeding in response to line-spacing movement of said handle; -acam lever pivotally mounted on said carriage and having an extended camsurface; a cam follower nose on said roll-carrying lever adapted to ridesaid cam surface during such movement of said support to separate saidrolls; a stop for holding said cam lever stationary while said nose isriding said cam surface; a spring for yieldably holding said cam leveragainst said stop; a spring for moving said roll-carrying lever to bringsaid nose behind the extended cam surface after said nose has passedbeyond it and thus to rock said roll-car, rying lever to bring saidsecond roll to ribbon clamping position; and means for moving saidsupport, said roll-carrying lever, and said rolls oppositely to thedirection of ribbon feeding, said cam lever being rocked by and movedout of the path of said nose to permit the movement of aaraooa saidrolls to take place without separation of means; frame-mounted means forsupplying ribbon at one end of the machine; frame-mounted means at theother end of the machine for taking up ribbon from the supply; pairs ofribbon-clamping rolls mounted 'on the carriage at opposite ends of theplaten for training the ribbon along the writing line of the platen;means for normally maintaining the rolls of each pair in ribbon-clampingrelation to the other rolls of the respective pairs; and means forseparating the rolls of each pair in response to opera- "tion of thecarriage-returning means.

25. In a. typewriter or like machine, a frame; a carriage mountedthereon for letter-spacing and return movements; carriage -returningmeans; frame-mounted means for supplying-ribbon at one end of themachine; frame-mounted means at the other end of the machine for takingup ribbon from the supply; pairs of ribbonclamping rolls mounted on thecarriage at onposite ends of the platen for training the ribbon alongthe writing line of the platen; means for normally maintaining the rollsof each pair in ribbon-clamping relation to the other rolls of therespective pairs; means for separating the rolls of each pair inresponse to operation of the carriage-returning means; and a pawl andratchet device associated with one of the rolls at the end of the platenadjacent the ribbon-feeding means for preventing reverse rotationof'said rolls.

26. In a typewriter or like machine, a frame; a carriage mounted thereonfor letter-spacingand return movements; carriage escapement mechanism;means fOr disabling the escapement mechanism; frame-mounted means forsupplying ribbon at one end of the machine; framemounted means at theother end of the machine for taking up ribbon from the supply; pairs ofribbon-clamping rolls mounted on the carriage at opposite ends of theplaten for training the ribbon along the writing line of the platen;means for normally maintaining the rolls of each pair in ribbon-clampingrelation to the other rolls of the respective pairs; and meansresponsive to operation of the-carriage escapement disabling means forseparating said rolls.

27. In a typewriter or like machine, a frame; a carriage-mounted thereonfor letter-spacing and return movements; carriage escapement mechanism;means for disabling the escapement mechanism; carriage-returning means;framemo'unted means for supplying ribbon at one end of the machine;frame-mounted means at the other end of the machine for taking up ribbonfrom the supply; pairs of ribbon-clamping rolls mounted on the carriageat opposite ends ofthe platen for training the ribbon along the writingline of the platen; means for normally maintaining the rolls of eachpair in ribbon-clamping relation to the other rolls of the respectivepairs; means for separating the rolls of each pair; and connectionsbetween said roll-separating means, said escapement disabling means, andsaid carriage-returning means for operating said rollseparating means inresponse to operation of either the escapement-disabling means or thecarriage-returning means- 1 28. In a typewriter or like machine, aframe; a carriage mounted thereon for letter-spacing and 1 returnmovements; carriage escapement mechanism; means for disabling theescapement mechanism; carriage-returning means; framemounted means forsupplying ribbon at one end of the machine; frame-mounted means at theother end of the machine for taking up ribbon from the supply; pairs ofribbon-clamping rolls mounted on the carriage at opposite ends of theplaten for training the ribbon along the writing line of the platen;means for normally maintaining the rolls of each pair in ribbon-clampingrelation to the other rolls of the respective pairs; means forseparating the rolls of each pair; and connections between saidroll-separating means, said escapement-disabling means, and saidcarriage-returning means for operating said rollseparating means inresponse to operation of either the escapement-disabling means or thecarriage-returning means, said connections including lost motion meansfor transmitting movement' from said carriage-retuming means to saidroll-separating means without producing effec: tive operation of saidescapement-disabling means and for transmitting movement from saidescapement-disabling means without producing eifective movement of saidcarriage-returning means.

29. In a typewriter or like machine, a frame; a carriage mounted thereonfor letter-spacing and return movements; tabulating mechanism;frame-mounted means for supplying ribbon at one end of the machine;frame-mounted means at the other end of the machine for taking up rollsof each pair in response to operation of th tabulating mechanism.

30. In a typewriter or like machine, a frame;

a carriage mounted thereon for letter-spacing and return movements;frame-mounted means for supplying ribbon atone end of the machine;

of each pair in ribbon-clamping relation to the' other rolls of therespective pairs; and means for simultaneously rendering the ribbontake-up means inactive and separating the rolls of each pair.

31. In a typewriter or like machine, a frame; a carriage mountedthereon. for letter-spacing and return movements; carriage escapementmechanism including a liftable rack; a platen mounted on the carriage; acombined line-spacing and carriage return handle mounted on thecarriage; a ribbon supply mounted on the frame; means for guiding ribbonfrom one end of the machine along the printing line of the platen; meansat the other end of the machine for feeding ribbon and for preventingreverse movement of the ribbon; a support mounted on the carriage atsaid first-named end of the machine for movement relative to thecarriage in the directions of carriage travel; a first roll journaled onsaid support; a lever pivoted on said support; a second roll journaledon said lever and being adapted to clamp the ribbon against said firstroll; connections between said handle and said of the support; a springconnected to said lever for rocking it to bring said second roll toribbonclamping position after said movement of .the support; a springeffective in response to return of the handle to normal position formoving said support oppositely to the direction of ribbon feeding; andconnections between said roll-carrying lever and said escapement rackfor rocking said lever to separate said rolls in response to lifting ofsaid rack and independently of movement of said support.

32. In a typewriter or like machine, a frame; a traveling carriagethereon; a platen on said carriage; means for training ribbon along thewriting, line of the platen and for frictionally opposing feeding of theribbon; a ribbon take-up spool; and operating connections between thecarriage and the take-up spool for impositively driving the latter, saidconnections including a toothed or serrated wheel element and acooperating slip pawl element, one of said elements being connected tosaid take-up spool and the other of said elements being adapted to befrictionally and impositively driven only in one direction in responseto carriage movement.

. said take-up spool and the other of said elements being adapted to befrictionally and impositively driven only in one direction in responseto carriage movement.

34. In a typewriter or like machine, a frame; a carriage mounted thereonfor letter-spacing and return movements; a platen on the carriage; meansmounting a supply of ribbon on the frame; means training ribbon fromsaid supply along the platen to extend from the supply in the directionof letter-spacing movement; a pair of non-reversible rolls on thecarriage f0; grasping ribbon and drawing it along with the platen duringletter-spacing movement; a take-up spool mounted on the frame for takingup ribbon extended from the supply past the platen and saidribbon-grasping rolls; and means providing impositive friction driveconnection between the carriage and take-up spool for driving the latterduring letterspacing movement.

35. In a typewriter or like machine, a frame; a carriage mounted thereonfor letter-spacing and return movements; a platen on the carriage; meansmounting a supply of ribbon on the frame; means training ribbon fromsaid supply along the platen to extend from the supply in the directionof letter-spacing movement; a pair of 1 non-reversible rolls on thecarriage for grasping ribbon and drawing it along with the platen duringletter-spacing movement; means for rendering said ribbon-grasping rollsineffective; a takeup spool mounted on the frame for taking up ribbonextended from the supply past the platen and said ribbon-grasping rolls;means providing impositive friction drive connection between thecarriage and take-up spool for driving the latter during letter-spacingmovement; and means for frictionally resisting drawing of ribbon fromsaid supply with suflicient force to prevent rotation of the take-upspool when said ribbon-grasping rolls have been rendered ineffective andsaid carriage is moved in letter-spacing direction.

- GEORGE F. HANDLEY.

